Activities

Grid manager and transmission agent

Red Eléctrica is responsible for the transmission of high voltage electricity in Spain. To do so, it manages the electricity infrastructures that make up the transmission grid and connects the power stations to the points where it is distributed to consumers.

Law 17/2007, of 4 July, confirmed the status of Red Eléctrica as the manager of the transmission grid and attributed it the function of sole transmission agent under a regime of exclusivity. In compliance with this Law, in 2010 Red Eléctrica acquired the assets of the Balearic Islands and Canary Islands and the remaining assets on the Spanish peninsula that were pending transfer from the electric utility companies. This acquisition represented the definitive consolidation of the model of sole transmission agent and electricity system operator.

As manager of the transmission grid, Red Eléctrica is responsible for developing and enlarging the grid, carrying out its maintenance and managing the transmission of electricity between external systems and the Spanish peninsula and guaranteeing third party access to the transmission grid under equal conditions.

In-service facilities

The transmission grid of Red Eléctrica is comprised of more than 42,000 kilometres of high voltage electricity lines and more than 5,000 substation bays, and more than 80,000 MVA of transformer capacity. These assets make up a meshed grid that is secure and reliable that offers the highest level of service quality to the Spanish electricity system.

Transmission grid (peninsular and extra-peninsular) Data available at December 31, 2015

Km of circuit 2011 2012 2013 2014 2015
400kV 19,671 20,109 20,639 21,094 21,179
220kV 18,410 18,779 19,053 19,192 19,387
150 - 132 - 110kV 272 272 272 272 398
< 110kV 2,011 2,014 2,014 2,014 2,022
Total 40,364 41,174 41,978 42,572 42,986

Substation bays (peninsular and extra-peninsular) Data available at December 31, 2015

Number of bays 2011 2012 2013 2014 2015
400kV 1,253 1,319 1,374 1,394 1,441
220kV 2,813 2,936 3,026 3,077 3,124
150 - 132 - 110kV 52 52 52 52 84
< 110kV 743 743 745 769 779
Total 4,861 5,050 5,197 5,292 5,428

Transformer capacity (peninsular and extra-peninsular) Data available at December 31, 2015

Power (MVA) 2011 2012 2013 2014 2015
Total 72,869 78,629 81,289 83,939 84,544